I understood the Delayed Eraser experiment, and the Eraser experiment and the basic double slit experiment. And all I can conclude is, why? Why is there such a necessity? I now understand that it's most probably impossible to learn the 2 properties at the same time but I don't see any mechanism that directs it. Only that it exists. I've heard of the idea that "the particle does not exist" and "the wave does not exist", "it only exists as a function". But that gets it to be more bizzare. And it doesn't explain its existence either.